Smart watches are fine, but they really don’t capture the DIY spirit. Over on Instructables, user benhur.gonvalves shows you how to build a smart little watch using an Arduino.

You’ll need an Arduino Pro Mini, some sensors, and a little general PCB knowledge to get it made. The end result is a watch that tracks your steps, checks the temperature and altitute, and works as a compass when you need it. As you’d expect from a prototype, this isn’t the most beautiful thing on the planet, but the guts are there so you can customize it to suit your own style.